#include "qemu/osdep.h"
#include "qapi/error.h"
#include "block/block_int.h"
+#include "block/qdict.h"
#include "sysemu/block-backend.h"
#include "qemu/module.h"
#include "qemu/option.h"
#include "qemu/crc32c.h"
#include "qemu/bswap.h"
-#include "block/vhdx.h"
+#include "vhdx.h"
#include "migration/blocker.h"
#include "qemu/uuid.h"
+#include "qapi/qmp/qdict.h"
+#include "qapi/qobject-input-visitor.h"
+#include "qapi/qapi-visit-block-core.h"
/* Options for VHDX creation */
VHDX_TYPE_DIFFERENCING, /* Currently unsupported */
} VHDXImageType;
+static QemuOptsList vhdx_create_opts;
+
/* Several metadata and region table data entries are identified by
* guids in a MS-specific GUID format. */
/* Validates the checksum of the buffer, with an in-place CRC.
*
* Zero is substituted during crc calculation for the original crc field,
- * and the crc field is restored afterwards. But the buffer will be modifed
+ * and the crc field is restored afterwards. But the buffer will be modified
* during the calculation, so this may not be not suitable for multi-threaded
* use.
*
break;
case PAYLOAD_BLOCK_FULLY_PRESENT:
qemu_co_mutex_unlock(&s->lock);
- ret = bdrv_co_readv(bs->file,
- sinfo.file_offset >> BDRV_SECTOR_BITS,
- sinfo.sectors_avail, &hd_qiov);
+ ret = bdrv_co_preadv(bs->file, sinfo.file_offset,
+ sinfo.sectors_avail * BDRV_SECTOR_SIZE,
+ &hd_qiov, 0);
qemu_co_mutex_lock(&s->lock);
if (ret < 0) {
goto exit;
}
static coroutine_fn int vhdx_co_writev(BlockDriverState *bs, int64_t sector_num,
- int nb_sectors, QEMUIOVector *qiov)
+ int nb_sectors, QEMUIOVector *qiov,
+ int flags)
{
int ret = -ENOTSUP;
BDRVVHDXState *s = bs->opaque;
uint64_t bat_prior_offset = 0;
bool bat_update = false;
+ assert(!flags);
qemu_iovec_init(&hd_qiov, qiov->niov);
qemu_co_mutex_lock(&s->lock);
}
/* block exists, so we can just overwrite it */
qemu_co_mutex_unlock(&s->lock);
- ret = bdrv_co_writev(bs->file,
- sinfo.file_offset >> BDRV_SECTOR_BITS,
- sectors_to_write, &hd_qiov);
+ ret = bdrv_co_pwritev(bs->file, sinfo.file_offset,
+ sectors_to_write * BDRV_SECTOR_SIZE,
+ &hd_qiov, 0);
qemu_co_mutex_lock(&s->lock);
if (ret < 0) {
goto error_bat_restore;
* .---- ~ ----------- ~ ------------ ~ ---------------- ~ -----------.
* 1MB
*/
-static int coroutine_fn vhdx_co_create_opts(const char *filename, QemuOpts *opts,
- Error **errp)
+static int coroutine_fn vhdx_co_create(BlockdevCreateOptions *opts,
+ Error **errp)
{
+ BlockdevCreateOptionsVhdx *vhdx_opts;
+ BlockBackend *blk = NULL;
+ BlockDriverState *bs = NULL;
+
int ret = 0;
- uint64_t image_size = (uint64_t) 2 * GiB;
- uint32_t log_size = 1 * MiB;
- uint32_t block_size = 0;
+ uint64_t image_size;
+ uint32_t log_size;
+ uint32_t block_size;
uint64_t signature;
uint64_t metadata_offset;
bool use_zero_blocks = false;
gunichar2 *creator = NULL;
glong creator_items;
- BlockBackend *blk;
- char *type = NULL;
VHDXImageType image_type;
- Error *local_err = NULL;
- image_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
- BDRV_SECTOR_SIZE);
- log_size = qemu_opt_get_size_del(opts, VHDX_BLOCK_OPT_LOG_SIZE, 0);
- block_size = qemu_opt_get_size_del(opts, VHDX_BLOCK_OPT_BLOCK_SIZE, 0);
- type = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
- use_zero_blocks = qemu_opt_get_bool_del(opts, VHDX_BLOCK_OPT_ZERO, true);
+ assert(opts->driver == BLOCKDEV_DRIVER_VHDX);
+ vhdx_opts = &opts->u.vhdx;
+ /* Validate options and set default values */
+ image_size = vhdx_opts->size;
if (image_size > VHDX_MAX_IMAGE_SIZE) {
- error_setg_errno(errp, EINVAL, "Image size too large; max of 64TB");
- ret = -EINVAL;
- goto exit;
+ error_setg(errp, "Image size too large; max of 64TB");
+ return -EINVAL;
}
- if (type == NULL) {
- type = g_strdup("dynamic");
+ if (!vhdx_opts->has_log_size) {
+ log_size = DEFAULT_LOG_SIZE;
+ } else {
+ if (vhdx_opts->log_size > UINT32_MAX) {
+ error_setg(errp, "Log size must be smaller than 4 GB");
+ return -EINVAL;
+ }
+ log_size = vhdx_opts->log_size;
+ }
+ if (log_size < MiB || (log_size % MiB) != 0) {
+ error_setg(errp, "Log size must be a multiple of 1 MB");
+ return -EINVAL;
}
- if (!strcmp(type, "dynamic")) {
+ if (!vhdx_opts->has_block_state_zero) {
+ use_zero_blocks = true;
+ } else {
+ use_zero_blocks = vhdx_opts->block_state_zero;
+ }
+
+ if (!vhdx_opts->has_subformat) {
+ vhdx_opts->subformat = BLOCKDEV_VHDX_SUBFORMAT_DYNAMIC;
+ }
+
+ switch (vhdx_opts->subformat) {
+ case BLOCKDEV_VHDX_SUBFORMAT_DYNAMIC:
image_type = VHDX_TYPE_DYNAMIC;
- } else if (!strcmp(type, "fixed")) {
+ break;
+ case BLOCKDEV_VHDX_SUBFORMAT_FIXED:
image_type = VHDX_TYPE_FIXED;
- } else if (!strcmp(type, "differencing")) {
- error_setg_errno(errp, ENOTSUP,
- "Differencing files not yet supported");
- ret = -ENOTSUP;
- goto exit;
- } else {
- error_setg(errp, "Invalid subformat '%s'", type);
- ret = -EINVAL;
- goto exit;
+ break;
+ default:
+ g_assert_not_reached();
}
/* These are pretty arbitrary, and mainly designed to keep the BAT
* size reasonable to load into RAM */
- if (block_size == 0) {
+ if (vhdx_opts->has_block_size) {
+ block_size = vhdx_opts->block_size;
+ } else {
if (image_size > 32 * TiB) {
block_size = 64 * MiB;
} else if (image_size > (uint64_t) 100 * GiB) {
}
}
-
- /* make the log size close to what was specified, but must be
- * min 1MB, and multiple of 1MB */
- log_size = ROUND_UP(log_size, MiB);
-
- block_size = ROUND_UP(block_size, MiB);
- block_size = block_size > VHDX_BLOCK_SIZE_MAX ? VHDX_BLOCK_SIZE_MAX :
- block_size;
-
- ret = bdrv_create_file(filename, opts, &local_err);
- if (ret < 0) {
- error_propagate(errp, local_err);
- goto exit;
+ if (block_size < MiB || (block_size % MiB) != 0) {
+ error_setg(errp, "Block size must be a multiple of 1 MB");
+ return -EINVAL;
+ }
+ if (!is_power_of_2(block_size)) {
+ error_setg(errp, "Block size must be a power of two");
+ return -EINVAL;
+ }
+ if (block_size > VHDX_BLOCK_SIZE_MAX) {
+ error_setg(errp, "Block size must not exceed %d", VHDX_BLOCK_SIZE_MAX);
+ return -EINVAL;
}
- blk = blk_new_open(filename, NULL, NULL,
- BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
- &local_err);
- if (blk == NULL) {
- error_propagate(errp, local_err);
- ret = -EIO;
- goto exit;
+ /* Create BlockBackend to write to the image */
+ bs = bdrv_open_blockdev_ref(vhdx_opts->file, errp);
+ if (bs == NULL) {
+ return -EIO;
}
+ blk = blk_new(BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL);
+ ret = blk_insert_bs(blk, bs, errp);
+ if (ret < 0) {
+ goto delete_and_exit;
+ }
blk_set_allow_write_beyond_eof(blk, true);
/* Create (A) */
goto delete_and_exit;
}
-
+ ret = 0;
delete_and_exit:
blk_unref(blk);
-exit:
- g_free(type);
+ bdrv_unref(bs);
g_free(creator);
return ret;
}
+static int coroutine_fn vhdx_co_create_opts(const char *filename,
+ QemuOpts *opts,
+ Error **errp)
+{
+ BlockdevCreateOptions *create_options = NULL;
+ QDict *qdict;
+ Visitor *v;
+ BlockDriverState *bs = NULL;
+ Error *local_err = NULL;
+ int ret;
+
+ static const QDictRenames opt_renames[] = {
+ { VHDX_BLOCK_OPT_LOG_SIZE, "log-size" },
+ { VHDX_BLOCK_OPT_BLOCK_SIZE, "block-size" },
+ { VHDX_BLOCK_OPT_ZERO, "block-state-zero" },
+ { NULL, NULL },
+ };
+
+ /* Parse options and convert legacy syntax */
+ qdict = qemu_opts_to_qdict_filtered(opts, NULL, &vhdx_create_opts, true);
+
+ if (!qdict_rename_keys(qdict, opt_renames, errp)) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ /* Create and open the file (protocol layer) */
+ ret = bdrv_create_file(filename, opts, &local_err);
+ if (ret < 0) {
+ error_propagate(errp, local_err);
+ goto fail;
+ }
+
+ bs = bdrv_open(filename, NULL, NULL,
+ BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, errp);
+ if (bs == NULL) {
+ ret = -EIO;
+ goto fail;
+ }
+
+ /* Now get the QAPI type BlockdevCreateOptions */
+ qdict_put_str(qdict, "driver", "vhdx");
+ qdict_put_str(qdict, "file", bs->node_name);
+
+ v = qobject_input_visitor_new_flat_confused(qdict, errp);
+ if (!v) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err);
+ visit_free(v);
+
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ /* Silently round up sizes:
+ * The image size is rounded to 512 bytes. Make the block and log size
+ * close to what was specified, but must be at least 1MB, and a multiple of
+ * 1 MB. Also respect VHDX_BLOCK_SIZE_MAX for block sizes. block_size = 0
+ * means auto, which is represented by a missing key in QAPI. */
+ assert(create_options->driver == BLOCKDEV_DRIVER_VHDX);
+ create_options->u.vhdx.size =
+ ROUND_UP(create_options->u.vhdx.size, BDRV_SECTOR_SIZE);
+
+ if (create_options->u.vhdx.has_log_size) {
+ create_options->u.vhdx.log_size =
+ ROUND_UP(create_options->u.vhdx.log_size, MiB);
+ }
+ if (create_options->u.vhdx.has_block_size) {
+ create_options->u.vhdx.block_size =
+ ROUND_UP(create_options->u.vhdx.block_size, MiB);
+
+ if (create_options->u.vhdx.block_size == 0) {
+ create_options->u.vhdx.has_block_size = false;
+ }
+ if (create_options->u.vhdx.block_size > VHDX_BLOCK_SIZE_MAX) {
+ create_options->u.vhdx.block_size = VHDX_BLOCK_SIZE_MAX;
+ }
+ }
+
+ /* Create the vhdx image (format layer) */
+ ret = vhdx_co_create(create_options, errp);
+
+fail:
+ qobject_unref(qdict);
+ bdrv_unref(bs);
+ qapi_free_BlockdevCreateOptions(create_options);
+ return ret;
+}
+
/* If opened r/w, the VHDX driver will automatically replay the log,
* if one is present, inside the vhdx_open() call.
*
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_co_readv = vhdx_co_readv,
.bdrv_co_writev = vhdx_co_writev,
+ .bdrv_co_create = vhdx_co_create,
.bdrv_co_create_opts = vhdx_co_create_opts,
.bdrv_get_info = vhdx_get_info,
.bdrv_co_check = vhdx_co_check,
projects / mirror_qemu.git / blobdiff